Fix menu event handlers calling order.

Pass the menu event to the window associated with the menu first, before
falling back on wxApp.

This required adding yet another flag to keep state in wxEvent but it seems to
be unavoidable as wxMenuBase::SendEvent() calls ProcessEvent() twice and we
must have some way to distinguish the first call from the second one.

Added a test case verifying that the menu events are indeed processed in the
expected order.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73921 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/event.cpp

@@ -370,6 +370,7 @@ wxEvent::wxEvent(int theId, wxEventType commandType)
     m_isCommandEvent = false;
     m_propagationLevel = wxEVENT_PROPAGATE_NONE;
     m_wasProcessed = false;
+    m_willBeProcessedAgain = false;
 }
 
 wxEvent::wxEvent(const wxEvent& src)
@@ -384,6 +385,7 @@ wxEvent::wxEvent(const wxEvent& src)
     , m_skipped(src.m_skipped)
     , m_isCommandEvent(src.m_isCommandEvent)
     , m_wasProcessed(false)
+    , m_willBeProcessedAgain(false)
 {
 }
 
@@ -403,6 +405,10 @@ wxEvent& wxEvent::operator=(const wxEvent& src)
 
     // don't change m_wasProcessed
 
+    // While the original again could be passed to another handler, this one
+    // isn't going to be processed anywhere else by default.
+    m_willBeProcessedAgain = false;
+
     return *this;
 }
 
@@ -1428,6 +1434,12 @@ bool wxEvtHandler::TryAfter(wxEvent& event)
     if ( GetNextHandler() )
         return GetNextHandler()->TryAfter(event);
 
+    // If this event is going to be processed in another handler next, don't
+    // pass it to wxTheApp now, it will be done from TryAfter() of this other
+    // handler.
+    if ( event.WillBeProcessedAgain() )
+        return false;
+
 #if WXWIN_COMPATIBILITY_2_8
     // as above, call the old virtual function for compatibility
     return TryParent(event);